摘要:
A method to limit overheating of a brake equipped with an electromechanically actuable parking brake including the steps of: driving a threaded spindle by an electric motor until a power drain (Imax), corresponding to a brake application force (F), is reached; detection of a travel distance (x0) of the piston corresponding to the brake application force (F) of the brake caliper in a locked state; determination of a second travel distance (x1) by adding a further travel distance value (x11), which corresponds to the desired clearance value, to form (x0); driving of the electric motor until the second travel distance (x1) has been covered by the brake piston; and comparing the vehicle speed with a predefined first speed value, at the upward transgression of which the electric motor is driven once more in the release direction until a further, previously defined travel distance (x12) has been covered.
摘要:
A method to limit overheating of a brake equipped with an electromechanically actuable parking brake including the steps of: driving a threaded spindle by an electric motor until a power drain (Imax), corresponding to a brake application force (F), is reached; detection of a travel distance (x0) of the piston corresponding to the brake application force (F) of the brake caliper in a locked state; determination of a second travel distance (x1) by adding a further travel distance value (x11), which corresponds to the desired clearance value, to form (x0); driving of the electric motor until the second travel distance (x1) has been covered by the brake piston; and comparing the vehicle speed with a predefined first speed value, at the upward transgression of which the electric motor is driven once more in the release direction until a further, previously defined travel distance (x12) has been covered.
摘要:
An electromechanically actuable parking brake for motor vehicles is disclosed. The brake includes at least one electromechanical actuator whose rotational movement is converted into a translational movement by an actuating unit, and which moves at least one brake element in such a way that at least one brake lining which is connected to the brake element is pressed with a locking force against a rotor which is connected to a motor vehicle wheel, wherein the current consumption of electromechanical actuator when the parking brake is engaged and/or released can be acquired. Furthermore, a method for operating the electromechanically actuable parking brake is also disclosed.
摘要:
An electromechanically actuable parking brake for motor vehicles is disclosed. The brake includes at least one electromechanical actuator whose rotational movement is converted into a translational movement by an actuating unit, and which moves at least one brake element in such a way that at least one brake lining which is connected to the brake element is pressed with a locking force against a rotor which is connected to a motor vehicle wheel, wherein the current consumption of electromechanical actuator when the parking brake is engaged and/or released can be acquired. Furthermore, a method for operating the electromechanically actuable parking brake is also disclosed.
摘要:
A parking brake having an actuator, wherein the actuator is driven by a direct current motor which can be operated in two directions. The actuator moves, via a self-locking gear mechanism of the actuator, at least one brake shoe for applying or releasing the parking brake in the direction of a rotary element or away therefrom. A control unit for performing open-loop or closed-loop control of the movement of the direct current motor is also provided. The parking brake is designed such that, when the parking brake is applied or released, an application point of the brake shoes against the rotary element is generally overshot. In order to increase the accuracy and reliability of the setting of the brake-application force when the parking brake is applied or of the brake-application clearance when the parking brake is released, the control unit determines the application point by forming the first derivative over time of the electric current taken up by the direct current motor during the application of the brake. A corresponding method for operating such a parking brake is also described.
摘要:
A parking brake having an actuator, wherein the actuator is driven with a direct current motor which can be operated in two directions and which moves a piston of the actuator and, via a self-locking gear mechanism of the actuator, at least one brake shoe for applying or releasing the parking brake. A control unit for performing open-loop or closed-loop control of the movement of the direct current motor is also provided. During open-loop or closed-loop control of the movement of the direct current motor for applying and/or releasing the parking brake, the control unit takes into account a hydraulic admission pressure which is currently present at the piston if the brake is applied or was present at the piston if the brake has been released when it had previously been applied. A corresponding method for operating such a parking brake is also disclosed.
摘要:
A parking brake having an actuator, wherein the actuator is driven by a direct current motor which can be operated in two directions. The actuator moves, via a self-locking gear mechanism of the actuator, at least one brake shoe for applying or releasing the parking brake in the direction of a rotary element or away therefrom. A control unit for performing open-loop or closed-loop control of the movement of the direct current motor is also provided. The parking brake is designed such that, when the parking brake is applied or released, an application point of the brake shoes against the rotary element is generally overshot. In order to increase the accuracy and reliability of the setting of the brake-application force when the parking brake is applied or of the brake-application clearance when the parking brake is released, the control unit determines the application point by forming the first derivative over time of the electric current taken up by the direct current motor during the application of the brake. A corresponding method for operating such a parking brake is also described.
摘要:
A parking brake having an actuator, wherein the actuator is driven with a direct current motor which can be operated in two directions and which moves a piston of the actuator and, via a self-locking gear mechanism of the actuator, at least one brake shoe for applying or releasing the parking brake. A control unit for performing open-loop or closed-loop control of the movement of the direct current motor is also provided. During open-loop or closed-loop control of the movement of the direct current motor for applying and/or releasing the parking brake, the control unit takes into account a hydraulic admission pressure which is currently present at the piston if the brake is applied or was present at the piston if the brake has been released when it had previously been applied. A corresponding method for operating such a parking brake is also disclosed.
摘要:
An operating method for a motor vehicle including an electronically controlled motor vehicle brake system, having an automated brake release function. A start-up request is determined electronically in an automated manner and subsequently at least one electronic command is transmitted to a parking brake actuating mechanism in order to release the brake, and the electronic unit EPB−ESC−ECU is networked with communication partners, for example, electronic units, sensors and/or data-bus systems in order to exchange signals and/or data with these communication partners, and including an electronic routine for providing software, configuring and/or calibrating the motor vehicle brake system. For improved operation, in a more flexible configuration routine, the routine for providing software, configuring and/or calibrating the motor vehicle brake system is embodied in a multi-level manner, and subsequent to the vehicle being produced the motor vehicle brake system includes at least self-learning properties in terms of an automated configuration routine.
摘要:
Disclosed are a method and a control system for applying defined clamping forces in a brake that is electrically operable by an actuator and includes a first friction surface (friction lining) and a second friction surface (brake disc). In the method, a correlation exists between the actuator position and the clamping force, and values of the clamping force as well as of the actuator position are determined. In order to improve the control quality when implementing the method, the nominal value (Fnominal) and the actual value (Fmeas) of the clamping force are filtered in each one low-pass filter (9, 10) of nth order, whose limit frequency is determined from a correlation between the actual value (nactual) of the actuator speed and the filtered value (FnominalFilt) of the clamping force, and that the filtered values (FnominalFilt, FmeasFilt) of the clamping force are transformed by means of a predefined characteristic curve into a nominal value (φnominal) and an actual value (φactual) of the actuator position.